stim-03.006_en control fluid

7/26/2019 Stim-03.006_en Control Fluid

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Siemens Power Generation This document contains proprietary information. It is submitted inconfidence and is to be used solely for the purpose for which it is furnishedand returned upon request. This document and such information is not to bereproduced, transmitted, disclosed, or used otherwise in whole or in partwithout written authorization.

Document typeNo.: STIM-03.006

Steam Turbine Information Manual Revision/Date: 14 2009-09-25

Issued by: P11P14

Title

Control Fluid Piping Design

Proj Code UA Content CodeUNID-Nr

Document Status: Preliminary Final ISO 9001 Clause & Title:


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Control Fluid Piping Design Steam Turbine Information Manual Document No.: STIM-03.006

Revision/Date: 14 2009-09-25

Page: 2 of 17


Released by: Andreas Logar E F PR SU EN R&D 14 signed Logar 2009-09-29

Reviewed by: JrgenHavemann

E F PR SU EN NA signedHavemann 2009-09-29

Prepared by: Heinz Ltters E F PR SU EN R&D 14 signed Ltters 2009-09-25

Name Org. Unit Signature Date

REVISION SHEET

REVISION REISSUE

DATE

SECTION DESCRIPTION OF CHANGE

010 2007-05-31 2.23.1

3.2.13.3

4.1

6

Valve actuators addedParagraphs addedPED note deleted3.3.2: table with data for pressure surge added4.1 max. allowable pressure drop and viscosity added

Drawings added

011 2008-02-29 3.2

4.1

Design and test pressure changed

Butt weld requirement added

012 2008-07-04 4.3 Functional safety requirements added

013 2009-02-02 3.3

4.1

- Closing times of bypass valves for driving in openposition changed, see report R&D1-09-006.

- Requirement for seamless piping added

014 2009-09-25 3.3.2 - Table with data for pressure surge: variant for partialstroke testing added


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TABLE OF CONTENTS

SECTION PAGE

1.

SCOPE .......................................................................................................................................................5

1.1 Responsibilities of the pipe designer:.................................................................................................... 5

2. GENERAL ..................................................................................................................................................52.1 National Standards................................................................................................................................ 5

2.2 Piping Interfaces.................................................................................................................................... 6

3. DESIGN REQUIREMENTS FOR CONTROL FLUID SYSTEM.................................................................63.1 General Design Requirements .............................................................................................................. 6

3.2 Load case steady state.......................................................................................................................... 7

3.2.1 Operating pressure:..................................................................................................... 7

3.2.2

Design pressure (set pressure of pressure relief valve downstream main pumps):.... 73.2.3 Test pressure (1.5 x Design pressure): ....................................................................... 7

3.3 Load case pressure surge..................................................................................................................... 7

3.3.1 Pressure surge (operating pressure + pressure increase):......................................... 73.3.2 Table with data for pressure surge calculation............................................................ 8

3.4 Load case pressure variation .............................................................................................................. 10

3.5 Load case with temperature variation ................................................................................................. 10

3.6 Other Load cases ................................................................................................................................ 10

4. PIPING DESIGN REQUIREMENTS.........................................................................................................114.1 General requirements.......................................................................................................................... 11

4.2

Insulation and trace heating ................................................................................................................ 12

4.3 I&C measures for steam turbines........................................................................................................ 12

4.3.1 Steam turbine with two or more valve combinations (stop and control valve) perexpansion range ...................................................................................................................... 124.3.2 Steam turbines with one valve combination (stop and control valve) per expansionrange .................................................................................................................................. 15

5. PIPING SYSTEM FABRICATION REQUIREMENTS..............................................................................185.1 General ................................................................................................................................................ 18

5.2 Welding................................................................................................................................................ 18

5.3 Non Destructive Test ........................................................................................................................... 18

5.4 Testing ................................................................................................................................................. 18

6. INFORMATION PROVIDED BY SPG......................................................................................................186.1 Thermal Expansion.............................................................................................................................. 18

6.2 Volume flows for pressure drop and pressure surge calculation........................................................ 18

6.3 Purity after oil flushing ......................................................................................................................... 18

6.4 P&ID..................................................................................................................................................... 18


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1. SCOPE

This document covers the general requirements for the design of interconnecting piping for theTurbine Control Fluid Systems. The associated project specific document is drawing xxxxx-

980294. The specific scope of interconnecting piping is indicated on the Turbine Control FluidSystem Diagrams.

If required, the scope of the piping must be including the scope of the insulation, trace heating,trace heating related I&C.

1.1 Responsibilities of the pipe designer:

The pipe designer is responsible for the design, analysis and specification of theinterconnecting piping systems per the requirements of ASME B31.1 or VGB R503 M, VGBR510 L and DIN EN13480-3 and this specification. This includes also the calculation ofstrength against pressure/pressure surges and pipeline flexibility for valve movement due to

thermal expansion. The information, examples and remarks submitted do not relieve thedesigner of responsibility for the system.

2. GENERAL

2.1 National Standards

Specific standards issued by the following organizations must be applied where referenced inthis specification. It is the Designer's responsibility to obtain copies of all referenced documentsand drawings.

ANSI American National Standards InstituteASME American Society of Mechanical EngineersASTM American Society of Testing Materials

or where required

DIN EN Deutsches Institut fr Normung / European NormISO International Standard OrganisationEG Machine Directive 98/37/EGPressure Equipment Directive (PED) 97/23/EGVGB R503 M, VGB R510 L


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2.2 Piping Interfaces

Piping Interfaces are located at the following equipment, depending on turbine type.:

Main Steam Valve Actuator

Hot Reheat Steam Valve Actuator

LP Induction Valve Actuator

Intercept Valve Actuator

Overload Valve Actuator

Heat Extraction Control Valve Actuator

Start-Up and Safety Valve Actuator

Bypass Valve Actuator

Hydraulic Supply Unit

3. DESIGN REQUIREMENTS FOR CONTROL FLUID SYSTEM

3.1 General Design Requirements

The electro-hydraulic valve actuators are provided with control fluid via one or more hydraulic

supply units (the quantity of units is depending on type of plant and quantity of valve actuators).

Valve vibrations must not affect the hydraulic supply unit. The control fluid is either mineral oil

or fire-resistant fluid (FRF).

The control fluid lines represent a very high risk potential due to the high operating pressure

and the additional pressure surges. Any leakages could lead to an oil fire in the potentially hot

surroundings. The control fluid line design must therefore be calculated with regard to strength

and restrained thermal expansion as well as the configuration of pipe supports such as fixed

points, guides and vibration dampeners.

Suitability of the pipeline wall thickness and pipe routing must be verified for the following load

cases given in chapter 3.2, 3.3 and 3.4.


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3.2 Load case steady state

3.2.1 Operating pressure:

p = 160 bar (2320 PSI) Temperature: = 60C (140F)

3.2.2 Design pressure (set pressure of pressure relief valve downstream main pumps):


3.2.3 Test pressure (1.5 x Design pressure):


3.3 Load case pressure surge

3.3.1 Pressure surge (operating pressure + pressure increase):

p = 160 + p bar (2320 PSI + p PSI) Temperature: = 60C (140F)

The pressure increase p on a sudden change in mass flow is based on the Joukowsky

pressure surge equation, the main equation from pressure surge theory. This provides

information on the possible pressure increase p on a sudden change in mass flow.

p = a . .w / 105 bar

where a = sound velocity, mineral oil and FRF : a = 1500 m/s (4921 ft/s)

w = change of velocity due to a sudden change of the mass flow

w = V& / A (m/s)

V& = flow rate (m3/s)

A = inner cross-sectional area (m2)

A= /4 . di

di = inner pipe diameter (m)

and = fluid density, mineral oil : = 900 kg/m3(56.2 lb/ft3)

FRF : = 1250 kg/m3 (78.0 lb/ft3).

This pressure increase propagates at the velocity of sound against the direction of flow of

the medium. The resulting shock forces on the piping system have to be used for specifying

the locations of guides, fixed points and vibration dampeners. The determination of the


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shock forces must be performed in accordance with standard industry analytical

techniques.

Note:

The following Siemens standard for calculation of the shock forces can be used forcomparison purposes.

Determination of the shock forces is a function of critical pipe length Lcrit .

Lcrit= a.ts where ts= servo or solenoid valve closing time

Fsurge= L.m& / ts if L Lcrit

Verification of suitability of the pipework against stresses must be performed in accordance

with ASME B31.1 or DIN EN13480-3.

3.3.2 Table with data for pressure surge calculation

The pressure surge in the control fluid system is caused either by rapid shutting off the

short circuit volume flow by servo respectively solenoid valve or by sudden stop of the

control fluid column through driving valve or actuator against the end position.

Explanation of Short circuit volume flow: This is the maximum possible volume flow

through pressure and return lines occurring after Steam turbine trip until servo respectively

solenoid valve switch back. This happens, if a turbine trip is released during opening ofvalve (servo/solenoid valve and trip solenoid valves are connected to different control

systems). All actuators with solenoid trip valves are affected by this.


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Valve TypeActuator

TypeClosing Time

ts[ms]

Occurrence

perlifetime

1)

Reason of pressure surgeVolume flow to be considered

[l/min]

200 10000 Closing time servo valveMain Steam

Control Valve

6 1Closing time servo valve failure

mode

See xxxxx-980294 chapter 3.4

Main Steam Stop Valve 25 10000 Closing time solenoid valve 25

200 10000 Closing time servo valveMain Steam

7) Stop Valve


mode


200 10000 Closing time servo valveHot ReheatSteam

Control Valve6 1

Closing time servo valve failuremode


Hot ReheatSteam

Stop Valve 25 10000 Closing time solenoid valve 25

200 10000 Closing time servo valveHot ReheatSteam

7)

Stop Valve6 1



200 10000 Closing time servo valveLP InductionSteam

Control Valve6 1



LP Induction

Steam


200 10000 Closing time servo valveIntercept Control Valve


mode


Intercept Stop Valve 25 10000 Closing time solenoid valve 25

200 10000 Closing time servo valve

Overload Control Valve6 1



Heat ExtractionControl

Control Valve - - No pressure surge expected -

Start-Up andSafety


6 100 Closing time servo valve2)Hot Reheat

BypassSingle Stem Control Valve 6 300Valve will be driven into full open

end position3)


6 100 Closing time servo valve2)Supply Steam

BypassSingle Stem

Control Valve6 300

Valve will be driven into full openend position

3)


6 100 Closing time servo valve2)

Hot ReheatBypass

Double Stem(2 welded anglevalves /Boxberg

Design)

Control ValveActuator with

spring 6 300Valve will be driven into full open

end position3)


25 100 Closing time solenoid valve See xxxxx-980294 chapter 3.4Hot ReheatBypass


Design)

Stop ValveActuator with

spring 6 10000Valve will be driven into full open

end positionSee xxxxx-980294 chapter 3.4

Hot ReheatBypass


Design)

Control andStop Valve

6 1Failure mode volume flow to stop

and control valve addedSee xxxxx-980294 chapter 3.4

Hot ReheatBypass

Double Stem(Z-valve design)

Control ValveActuator without

spring6 400

Valve will be driven into full endposition

2)3)4)5)


25 100 Closing time solenoid valve See xxxxx-980294 chapter 3.4Hot ReheatBypass


Stop Valve6 10000



Hot ReheatBypass Control andStop Valve 6 1 Failure mode volume flow to stopand control valve added6)



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Valve TypeActuator

Type

Closing Time

ts[ms]

Occurrenceper

lifetime1)

Reason of pressure surgeVolume flow to be considered

[l/min]


Supply SteamBypass

Double Stem(Z-

valve design)

Control ValveActuator without

spring6 400

Valve will be driven into full endposition

2)3)4)5)


25 100 Closing time solenoid valve2)

See xxxxx-980294 chapter 3.4Supply SteamBypass

Double Stem (Z-valve design)

Stop Valve6 10000



Supply SteamBypass

Double Stem (Z-valve design)

Control andStop Valve

6 1Failure mode volume flow to stop

and control valve added6)


Notes: 1) Maximum expected loading combinations.2) Bypass Trip (e.g. due to loss of injection water or increasing condenser pressure).3) Full opening of bypass valve (e.g. load rejection and turbine trip under high loads).4) For bypass double stem control valves (Z-design, actuator without spring) there is no short circuit flow due to

design without trip valves.5) 400 loads = 300 loads full open + 100 loads full closed end position.

6) Trip actuation during opening of control valve causes switching of servo valve.7) Only for valves with partial stroke testing.

3.4 Load case pressure variation

Pressure variation betweenLoad cycles

130bar (1885 PSI) and 160bar (2320 PSI)

The fatigue-strength underpulsating (oscillating,fluctuating) compressivestress must be guaranteed.

115bar (1668 PSI) and 160bar (2320 PSI) The load cycle of 10000 hasto be considered.

0 bar (0 PSI) and 160bar (2320 PSI)The load cycle of 400 has tobe considered.

3.5 Load case with temperature variation

Temperature Load cycle of 7000 has to be considered (for temperature delta of 50 Kelvin).

All other temperature cycles below 50K must be guaranteed for life time of the piping.

3.6 Other Load cases

For additional loads caused by vibration of electro-hydraulic actuators, working platforms,earthquakes, etc.


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4. PIPING DESIGN REQUIREMENTS

4.1 General requirements

Movement of the valves due to thermal expansionDue to the high forces and the large movement of the valves, especial care must be taken,

when designing the first support of the control fluid pipe after the valve. The small controlfluid pipes must have a short span between the valve and the first support due to the highforces of the pressure surge. However, due to the large movement of the valves there mustbe a certain distance between valve and first support to reduce the stress in the pipe. Tofulfill both requirements vibration dampeners are necessary. This must be calculated inevery case.

The following must be taken into consideration where calculating the thermal expansion ofthe connection points at the actuators:

Main steam valve, Hot Reheat, Overload- and Intercept Steam Valve and HeatExtraction Control valve

The thermal expansion of the turbine, the steam valves itself and the adjoining pipesmust be considered.

Bypass ValvesThe movement of the adjoining pipe and the movement of the condenser must beconsidered as well as the thermal expansion of the bypass valve itself.

LP Induction ValveIf the valve is flanged at the turbine the thermal expansion of the turbine must beconsidered. If it part of the pipe, the movement of the pipe must be considered.

Start-Up and Safety ValveThe movement of the adjoining pipe as well as the thermal expansion of the valve itselfmust be considered.

The pipes are pressure sensitive lines. Therefore the allowable pipe pressure drop islimited. The maximum allowable pressure drop values are:

5 bar for pressure pipes2,5 bar for return pipes.

Pressure drop must be calculated with a fluid viscosity of 46 cSt. [Note: For ISO VG46 (either

mineral oil or FRF) fluid this is corresponding to a fluid temperature of 40C which is a reasonabletemperature when MAX system is in operation and bigger control valve movements may occur.]

The associated volume flow is given in xxxxx-980294, chapter 3.3.

The pipes must be routed with a constant pitch of 1 back to the hydraulic supply unit.

Vibrations can have several causes such as rotating machines like turbines and motors,flows through piping, valves and fittings etc. To avoid serious damage of welds andmaterial, the piping must be supported by means of dampers and guides wherever there isa hazard that vibrations can arise.

!


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Since it is not possible to anticipate if vibrations occur during the piping design, it isrequired that the piping will be checked during commissioning. Special attention must bepaid to high-frequency vibrations, because they quickly reduce the fatigue strength.

The pipe material must be stainless steel.

All welding seams of the pressure line must to be performed as butt weld.

Only seamless pipes are allowed

4.2 Insulation and trace heating

For outdoor units where the ambient temperature and for indoor units where the temperature inthe turbine building is expected to be at or below 5C (41F), the piping and the actuators mustbe provided with insulation and trace heating. Installation of trace heating systems is specifiedfor the following:

- Supply lines for control fluid system connecting tank to actuators- Actuators for turbine valves (main-, reheat-, LP induction steam)- Return lines connecting actuators to tank

Solenoid valves, servo valves on the control block and position transmitters must be installedwithoutthermal insulation

When trace heating is used, the max. pipe and actuator temperature must not exceed 25C(77F ). During operation with trace heating the control fluid temperature cycle must notexceed 20 Kelvin.

The temperature limits are valid for fluids according to STIM-05.002.

In the event that a trace heating system is not activated when needed or has failed of a traceheating system, the closing function is then no longer assured for turbine valve actuators. Loadrejection may then result in turbine overspeed with consequential catastrophic failure of therotor.

To reduce the hazard potential commensurately, appropriate protection circuits must beinstalled. These serve to close the affected valves before temperatures have fallen below safetemperature levels.

4.3 I&C measures for steam turbines

In case standards on Functional Safety apply (IEC61508, IEC61511, ISA S84.01, ....) thefollowing description of I&C measures has to be completed by analysis, specification andvalidation measures as described in these standards.

4.3.1 Steam turbine with two or more valve combinations (stop and control valve) perexpansion range

A 1-out-of-2 temperature protection circuit (with monitoring of the trace heating)must beinstalled for the return line of each HP steam, IP steam and LP (induction) steam valvecombination. Failure of the trace heating for the associated valve combination causesresponse of this circuit and closure of this valve combination by initiation of individual trip in


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good time (before control fluid temperature in the return line falls below a safe level: alarmsignal issue at temperature below/equal to 10C (below/equal to 50F), trip signal issue attemperature below/equal to 8C (below/equal to 46F ) ).

Temperature measurement (clamping strap elements) for this temperature protectioncircuit must be implemented by means of instrumentation installed under the thermal

insulation slightly ahead (about 0.5 m) of the tank for the control fluid supply system.The temperature protection circuit must be implemented such as to give a safe failurepercentage of better than 60%.

In the case of the LP (induction) steam valve combination, a temperature protection circuitfor the return line must be supplemented by installation of an additional 1-out-of-2temperature protection circuit on both the stop valve actuator and the control valve actuatorfor configurations that feature two separate trace heating systems (for the stop valve andfor the control valve). The associated temperature instrumentation must be installed on theoperating cylinder (see diagram 1). In the event that a common trace heating system isimplemented for the two actuators, a common additional 1-out-of-2 temperature protectioncircuit for the two actuators is then adequate. The associated temperature instrumentation

must be installed on the operating stop valve cylinder (see diagram 1).In the event that a common trace heating system is implemented for the return line and thetwo LP (induction) steam valve actuators, a common additional 1-out-of-2 temperatureprotection circuit on the return line is then adequate. Temperature measurement for thistemperature protection circuit must be implemented by means of instrumentation installedunder the thermal insulation slightly ahead (about 0.5 m) of the tank for the control fluidsupply system.

To rule out control fluid degradation in the event of excess temperatures, alarms arederived from the separate temperature measurements in response to T> 70C (158F) inthe case of mineral oil and in response to T>65C (149F) in the case of FRF.

A trip signal must be formed for each steam valve combination. This must be implementedin the form of binary, redundant signals routed along break-current circuitry (deenergize totrip) to the Siemens PG automation system scope of supply (see schematic).


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Control Oil Piping Design Steam Turbine Information Manual Document No.: STIM-03.006


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1 oo 2

MP 4MP 1 MP 2

trip of

low pressurevalve

combination

individual control of the

5 valve combinations

2 out of 2

for eachprotection circle with

noncoincidence monitoring

1 oo 2 1 oo 21 oo 2

>=1

2 Trip-Signals for eachprotection circle

normally energized

CONCEPT TEMPERATURE PROTECTION TRACE HEATING SYSTEM

Turbine with two valve combinations (stop and control valve) per expansion range

2 out of 2 TRIP SIGNALS

P P PPP

P PP P

T T T

TT

PT100 resistance

thermometer

surface mounted

MP 1

Legend:

MP measuring-point

MP 2

MP 3

MP 4 MP 5

sensor 1

sensor 2

protection circle MP3, MP6

and MP7 depending from

trace heating line

MP 7MP 6

PT100 resistance

thermometer

surface mounted

PT100 resistance

thermometer

surface mounted

PT100 resistance

thermometersurface mounted

PT100 resistance

thermometer

surface mounted

PT100 resistance

thermometersurface mounted

MP 6 and 7 depending from

trace heating line

O.K.-Signals

Freeze Protection Units

MP 6 MP 7

P

1 oo 2 1 oo 2

trip of

high pressure

valve

combination 1

trip ofhigh pressure

valve

combination 2

trip of

intermediatepressure

valve

combination 1


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4.3.2 Steam turbines with one valve combination (stop and control valve) per expansionrange

A 1-out-of-2 temperature protection circuit (with monitoring of the trace heating) must beinstalled for the return line of each HP steam, IP steam and LP (induction) steam valve

combination. Failure of the trace heating for the associated valve combination causesresponse of this circuit (before control fluid temperature in the return line falls below a safelevel: alarm signal issue at temperature below/equal to 10C (below/equal to 50F), tripsignal issue at temperature below/equal to 8C (below/equal to 46F ) ).

Temperature measurement (clamping strap elements) for this temperature protection circuitmust be implemented by means of instrumentation installed under the thermal insulationslightly ahead (about 0.5 m) of the tank for the control fluid supply system.The temperature protection circuit must be implemented such as to give a safe failurepercentage of better than 60%.

In the case of the LP (induction) steam valve combination, a temperature protection circuit

for the return line must be supplemented by installation of an additional 1-out-of-2temperature protection circuit on both the stop valve actuator and the control valve actuatorfor configurations that feature two separate trace heating systems (for the stop valve andfor the control valve). The associated temperature instrumentation must be installed on theoperating cylinder (see diagram 1). In the event that a common trace heating system isimplemented for the two actuators, a common additional 1-out-of-2 temperature protectioncircuit for the two actuators is then adequate. The associated temperature instrumentationmust be installed on the operating stop valve cylinder (see diagram 1).In the event that a common trace heating system is implemented for the return line and thetwo LP (induction) steam valve actuators, a common additional 1-out-of-2 temperatureprotection circuit on the return line is then adequate.

To rule out control fluid degradation in the event of excess temperatures, alarms arederived from the separate temperature measurements in response to T> 70C (158F) inthe case of mineral oil and in response to T>65C (149F) in the case of FRF.

A common trip signal must be formed for the HP steam and IP steam valve combinations.This must be implemented in the form of binary, redundant signals routed along break-current circuitry (deenergize to trip) to the Siemens PG automation system scope of supply(see schematic).

A common trip signal must be formed for the two actuators of the LP (induction) steamvalve combination. This must be implemented in the form of binary, redundant signalsrouted along break-current circuitry (deenergize to trip) to the Siemens PG automation

system scope of supply.


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Diagram 1


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protection circle MP3, MP4

and MP5 depending from

trace heating line

2 out of 2

for eachprotection circle with

noncoincidence monitoring

1 oo 2

2 Trip-Signals for each protection circle

normally energized

O.K.-Signals

Freeze Protection Units

MP 2MP 1MP 5MP 4

trip oflow pressure

valve combination

individual control of the

3 valve combinations

CONCEPT TEMPERATURE PROTECTION TRACE HEATING SYSTEMTurbine with 1 valve combination (stop and control valve) per expansion range

2 out of 2 TRIP SIGNALS

P PP

PP

T T

T

Legend:

MP measuring-point

MP 1

MP 3

MP 2

MP 5MP 4

PT100 resistance

thermometer

surface mounted

PT100 resistance

thermometer

surface mounted

PT100 resistance

thermometer

surface mounted

P

sensor 1

sensor 2

trip ofsteam turbine

1 oo 2 1 oo 21 oo 21 oo 2

>=1 >=1

PT100 resistance thermometer

surface mounted

MP4 and 5 depending from

trace heating line


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Siemens Power Generation This document contains proprietary information. It is submitted inconfidence and is to be used solely for the purpose for which it is furnishedand returned upon request. This document and such information is not to bereproduced, transmitted, disclosed, or used otherwise in whole or in part

5. PIPING SYSTEM FABRICATION REQUIREMENTS

5.1 General

The fabrication, inspection and testing of the piping system must be per the requirements of

ASME B31.1 or where required according VGB R503 M + VGB R510L, STIMs andTransmittal Drawings.

5.2 Welding

All welding must be per the requirements of ASME B31.1 or where required according VGBR503 M + VGB R510L and STIM-03.002.

5.3 Non Destructive Test

Siemens requires a non-destructive test for all lines within the control fluid system (MAX).The requirements are specified in the STIM-03.009.

5.4 Testing

The Control Fluid Pipes must be hydrostatic tested. The pressure of the hydrostaticpressure test must be 1.5 x design pressure.

6. INFORMATION PROVIDED BY SPG

6.1 Thermal Expansion

xxxxx-980255 MAIN STEAM VALVE

xxxxx-980256 REHEAT STEAM VALVE/INTERCEPT VALVE

xxxxx-980258 OVERLOAD VALVE

xxxxx-980321 HOT REHEAT BYPASS VALVE

xxxxx-980322 SUPPLY STEAM BYPASS VALVE

xxxxx-980360 LP INDUCTION VALVE

xxxxx-980332 HEAT EXTRACTION CONTROL VALVE

xxxxx-980355 START-UP AND SAFETY VALVE

6.2 Volume flows for pressure drop and pressure surge calculation

xxxxx-980294 REQUIREMENTS ON CONTROL FLUID SYSTEM

6.3 Purity after oil flushing

STIM-11.009 CONTROL FLUID SYSTEM FLUSHING AND CLEANING PROCEDURE

6.4 P&ID

xxxxx-983130 SYSTEM DIAGRAM CONTROL FLUID

xxxxx-983131 SYSTEM DIAGRAM CONTROL FLUID (BYPASS)

stim-03.006_en control fluid

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